Railroad from Yoknapatawpha to Memphis in Go Down, Moses (Location)

In Go Down, Moses Ike and Boon travel directly from Hoke's to Memphis. When characters in other fictions travel from Jefferson to Memphis, they have to change trains north of Yoknapatawpha. Faulkner drew only one railroad on both his maps of the county, so presumably he forgot or simply ignores that fact in the novel - as he had earlier in "Lion," the short story where Boon's trip Memphis earlier appeared.